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On this site you'll find lots of logic puzzles and riddles, puzzling riddles,
science puzzles and math puzzles and riddles.

Answers and detailed solutions are included.

Do you know other nice brain teasers, riddles or puzzles that should be on the site?
If that's the case, send a message to pzzls!

math puzzle

Letter folding

If you would fold a letter in two fifty times, how thick should the enveloppe be that can fit the letter? Assume that the thickness of a piece of paper is about 0.05 mm.

mail puzzle

rating 2.7/5

answer - solution

puzzle top 10

1.	Einstein's riddle	logic puzzle	rating: 3.8/5


2.	Lockers	math puzzle	rating: 3.6/5


3.	Divisible from 1 to 9	math puzzle	rating: 3.6/5


4.	Lost your way	logic puzzle	rating: 3.5/5


5.	Find the way to freedom	logic puzzle	rating: 3.5/5


6.	The superstitious president	logic puzzle	rating: 3.4/5


7.	Dots and lines	logic puzzle	rating: 3.4/5


8.	Address unknown	logic puzzle	rating: 3.4/5


9.	Straight line sum	math puzzle	rating: 3.3/5


10.	Bob and John	math puzzle	rating: 3.3/5

Last changed 16-01-2010